Patents by Inventor Kei Ohkubo

Kei Ohkubo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11827578
    Abstract: The present invention is intended to provide a method that can produce an oxidation reaction product of a hydrocarbon or a derivative thereof in an aqueous phase using a hydrocarbon or a derivative thereof as a raw material. In order to achieve the above object, the method for producing an oxidation reaction product of a hydrocarbon or a derivative thereof of the present invention includes the step of: irradiating a reaction system with light in a presence of a raw material and a halogen oxide radical to react, wherein the raw material is a hydrocarbon or a derivative thereof, the reaction system is a reaction system containing an aqueous phase, the aqueous phase contains the raw material and the halogen oxide radical, and in the reaction step, the raw material is oxidized to produce an oxidation reaction product of the raw material.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: November 28, 2023
    Assignee: Osaka University
    Inventor: Kei Ohkubo
  • Publication number: 20230324666
    Abstract: The present invention provides a graphene grid that can suppress or prevent uneven distribution, uneven orientation, and the like of a structural analysis target substance, and can capture the structural analysis target substance with high efficiency and analyze the structural analysis target substance with high resolution, in a structural analysis by cryo-electron microscopy. A graphene grid of the present invention has a graphene surface into which a functional group is introduced.
    Type: Application
    Filed: August 20, 2021
    Publication date: October 12, 2023
    Inventors: Tsuyoshi INOUE, Haruyasu ASAHARA, Kei OHKUBO, Keiichi NAMBA, Takayuki KATO, Fumiaki MAKINO, Junso FUJITA, Shota KUMANO
  • Patent number: 11407871
    Abstract: The present invention provides a new method by which polymers can be modified. The present invention provides a method for modifying a polymer including the step of: irradiating a reaction system containing a polymer with light to react the reaction system in a presence of a compound radical, wherein the compound radical is a radical containing one element selected from the group consisting of Group 15 elements and Group 16 elements, and a Group 17 element.
    Type: Grant
    Filed: December 16, 2017
    Date of Patent: August 9, 2022
    Assignees: Earth Corporation, Osaka University
    Inventors: Kiyoto Takamori, Kei Ohkubo, Tsuyoshi Inoue, Yasushi Mizuta, Yuichi Itou
  • Publication number: 20220204346
    Abstract: The present invention provides a method for producing a substance with a modified carbon allotrope surface that can suppress or prevent uneven distribution, uneven orientation, and the like of a structural analysis target substance in a structural analysis by cryo-electron microscopy. A method for producing a substance with a modified carbon allotrope surface of the present invention includes: the step of surface-treating by reacting a carbon allotrope surface with a halogen oxide radical, wherein the carbon allotrope surface is modified by the surface-treating.
    Type: Application
    Filed: March 27, 2020
    Publication date: June 30, 2022
    Inventors: Tsuyoshi INOUE, Haruyasu ASAHARA, Kei OHKUBO, Kenji IWASAKI, Naoyuki MIYAZAKI, Mika HIROSE, Atsushi NAKAGAWA, Junichi TAKAGI, Takefumi DOI, Hiroaki ADACHI
  • Patent number: 11326035
    Abstract: The present invention provides a new method for modifying a polymer molded body and binding a target molecule. The method for selectively binding a target molecule to a polymer molded body of the present invention includes: a pretreatment step of irradiating a selected surface of a polymer molded body with light in the presence of a compound radical; and a binding step of reacting a target molecule with the polymer molded body after the pretreatments to bind the target molecule to the selected surface of the polymer molded body, wherein the compound radical is a radical containing one element selected from the group consisting of Group 15 elements and Group 16 elements, and a Group 17 element.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: May 10, 2022
    Assignees: Earth Corporation, Osaka University
    Inventors: Kiyoto Takamori, Kei Ohkubo, Haruyasu Asahara, Tsuyoshi Inoue
  • Publication number: 20210403395
    Abstract: The present invention is intended to provide a method that can produce an oxidation reaction product of a hydrocarbon or a derivative thereof in an aqueous phase using a hydrocarbon or a derivative thereof as a raw material. In order to achieve the above object, the method for producing an oxidation reaction product of a hydrocarbon or a derivative thereof of the present invention includes the step of: irradiating a reaction system with light in a presence of a raw material and a halogen oxide radical to react, wherein the raw material is a hydrocarbon or a derivative thereof, the reaction system is a reaction system containing an aqueous phase, the aqueous phase contains the raw material and the halogen oxide radical, and in the reaction step, the raw material is oxidized to produce an oxidation reaction product of the raw material.
    Type: Application
    Filed: June 18, 2019
    Publication date: December 30, 2021
    Inventor: Kei OHKUBO
  • Publication number: 20210263339
    Abstract: The present invention provides a new method for producing a lens to be fitted to an eye in a simple manner at a low cost. In order to achieve the aforementioned object, the present invention provides a method for producing a lens to be fitted to an eye, including the step of: hydrophilizing a surface of a polymer lens by reacting with a compound radical, wherein the compound radical is a radical containing one element selected from the group consisting of Group 15 elements and Group 16 elements, and a Group 17 element.
    Type: Application
    Filed: June 20, 2019
    Publication date: August 26, 2021
    Inventors: Kohji NISHIDA, Koichi BABA, Shizuka KOH, Kei OHKUBO, Haruyasu ASAHARA, Tsuyoshi INOUE, Hiroshi UYAMA, Taka-Aki ASOH
  • Publication number: 20210214492
    Abstract: To provide a surface-treated polymer production method which can be performed in a simplified manner and at low cost. In order to achieve the aforementioned object, the surface-treated polymer production method according to the present invention include: reacting a surface of a polymer with a halogen oxide radical to surface-treat the polymer, and in the surface-treating, a reaction system is not irradiated with light.
    Type: Application
    Filed: May 17, 2019
    Publication date: July 15, 2021
    Inventors: Haruyasu ASAHARA, Taka-Aki ASOH, Tsuyoshi INOUE, Hiroshi UYAMA, Kei OHKUBO
  • Publication number: 20210189569
    Abstract: To provide a treated polymer production method which can be performed in a simplified manner and at low cost. In order to achieve the object, the treated polymer production method according to the present invention includes: reacting a surface of a polymer with a halogen oxide radical to surface-treat the polymer. The treated polymer is a metal-plated polymer, and the method further includes plating, with a metal, the surface of the polymer after the surface-treating, or the treated polymer is an adhesion laminate of the polymer and an adherend, and the method further includes adhering the adherend to the surface of the polymer after the surface-treating.
    Type: Application
    Filed: May 17, 2019
    Publication date: June 24, 2021
    Inventors: Taka-Aki ASOH, Haruyasu ASAHARA, Tsuyoshi INOUE, Hiroshi UYAMA, Kei OHKUBO
  • Patent number: 10947190
    Abstract: The first aspect of the present invention is intended to provide a method for producing an oxidation reaction product of the hydrocarbon or a derivative thereof efficiently using hydrocarbon or a derivative thereof as a raw material. In order to achieve the above object, the first aspect of the present invention provides a method for producing an oxidation reaction product of a hydrocarbon or a derivative thereof. The method includes the step of irradiating a reaction system with light in the presence of a raw material and a chlorine dioxide radical. The raw material is hydrocarbon or a derivative thereof, the reaction system is a reaction system containing an organic phase, and the organic phase contains the raw material and the chlorine dioxide radical. In the step of irradiating a reaction system with light, the raw material is oxidized by the light irradiation to generate an oxidation reaction product of the raw material.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: March 16, 2021
    Assignees: ACENET INC., Osaka University
    Inventors: Kiyoto Takamori, Takekatsu Shibata, Kei Ohkubo
  • Publication number: 20210032428
    Abstract: The present invention provides a new method for modifying a polymer molded body and binding a target molecule. The method for selectively binding a target molecule to a polymer molded body of the present invention includes: a pretreatment step of irradiating a selected surface of a polymer molded body with light in the presence of a compound radical; and a binding step of reacting a target molecule with the polymer molded body after the pretreatments to bind the target molecule to the selected surface of the polymer molded body, wherein the compound radical is a radical containing one element selected from the group consisting of Group 15 elements and Group 16 elements, and a Group 17 element.
    Type: Application
    Filed: February 5, 2019
    Publication date: February 4, 2021
    Inventors: Kiyoto TAKAMORI, Kei OHKUBO, Haruyasu ASAHARA, Tsuyoshi INOUE
  • Publication number: 20200377453
    Abstract: The first aspect of the present invention is intended to provide a method for producing an oxidation reaction product of the hydrocarbon or a derivative thereof efficiently using hydrocarbon or a derivative thereof as a raw material. In order to achieve the above object, the first aspect of the present invention provides a method for producing an oxidation reaction product of a hydrocarbon or a derivative thereof. The method includes the step of irradiating a reaction system with light in the presence of a raw material and a chlorine dioxide radical. The raw material is hydrocarbon or a derivative thereof, the reaction system is a reaction system containing an organic phase, and the organic phase contains the raw material and the chlorine dioxide radical. In the step of irradiating a reaction system with light, the raw material is oxidized by the light irradiation to generate an oxidation reaction product of the raw material.
    Type: Application
    Filed: December 16, 2016
    Publication date: December 3, 2020
    Applicants: AceNet Inc., Osaka University
    Inventors: Kiyoto TAKAMORI, Takekatsu SHIBATA, Kei OHKUBO
  • Publication number: 20190315936
    Abstract: The present invention provides a new method by which polymers can be modified. The present invention provides a method for modifying a polymer including the step of: irradiating a reaction system containing a polymer with light to react the reaction system in a presence of a compound radical, wherein the compound radical is a radical containing one element selected from the group consisting of Group 15 elements and Group 16 elements, and a Group 17 element.
    Type: Application
    Filed: December 16, 2017
    Publication date: October 17, 2019
    Inventors: Kiyoto TAKAMORI, Kei OHKUBO, Tsuyoshi INOUE, Yasushi MIZUTA, Yuichi ITOU
  • Publication number: 20120171111
    Abstract: The present invention provides a process for producing an oxidation reaction product of an aromatic compound, having excellent environmental load reduction performance, cost reduction performance, etc. Provided is a process for producing an oxidation reaction product of a raw material aromatic compound by reacting the raw material aromatic compound with an oxidizing agent. The process further uses an electron donor-acceptor linked molecule. The process includes the step of: reacting the electron donor-acceptor linked molecule in an electron-transfer state, the oxidizing agent, and the raw material aromatic compound, thereby generating an oxidation reaction product resulting from oxidation of the raw material aromatic compound.
    Type: Application
    Filed: September 15, 2010
    Publication date: July 5, 2012
    Applicant: OSAKA UNIVERSITY
    Inventors: Kei Ohkubo, Shunichi Fukuzumi, Kentaro Mizushima
  • Patent number: 7977486
    Abstract: An electron donor-acceptor dyad is provided that can provide a charge-separated state with longevity and not only high oxidizing power but also high reducing power. A compound of the present invention is a quinolinium ion derivative represented by the following formula (I), a stereoisomer or tautomer thereof, or a salt thereof: where R1 is a hydrogen atom or an alkyl group, and Ar1 to Ar3 each are a hydrogen atom or an electron-donating group. The compound of the present invention has the above-mentioned structure and therefore can provide a charge-separated state with longevity and not only high oxidizing power but also high reducing power and can be used for various products such as photocatalysts, photosensitizers, dyes, oxidants, reductants, dye-sensitized solar cells, and organic EL devices.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: July 12, 2011
    Assignee: Osaka University
    Inventors: Shunichi Fukuzumi, Hiroaki Kotani, Kei Ohkubo
  • Publication number: 20100004454
    Abstract: An electron donor-acceptor dyad is provided that can provide a charge-separated state with longevity and not only high oxidizing power but also high reducing power. A compound of the present invention is a quinolinium ion derivative represented by the following formula (I), a stereoisomer or tautomer thereof, or a salt thereof: where R1 is a hydrogen atom or an alkyl group, and Ar1 to Ar3 each are a hydrogen atom or an electron-donating group. The compound of the present invention has the above-mentioned structure and therefore can provide a charge-separated state with longevity and not only high oxidizing power but also high reducing power and can be used for various products such as photocatalysts, photosensitizers, dyes, oxidants, reductants, dye-sensitized solar cells, and organic EL devices.
    Type: Application
    Filed: March 5, 2007
    Publication date: January 7, 2010
    Applicant: OSAKA UNIVERSITY
    Inventors: Shunichi Fukuzumi, Hiroaki Kotani, Kei Ohkubo
  • Patent number: 6720458
    Abstract: The present invention relates to a catalyst useful for a photooxidation reaction and also relates to a novel process for producing aldehydes, particularly aromatic aldehydes, which are useful as an intermediate for the production of agrochemical and medical preparations. The catalyst is particularly suitable for the oxidation of a methyl group difficult to oxidize. A photooxidation catalyst according to the invention is a halogenated aromatic nitrile represented by the following formula (1): (wherein X represents a chlorine atom or a fluorine atom, m represents an integer of 1 to 5, n represents an integer of 1 to 5, m+n≦6, and when n is 2 or more, Xs may be the same or different).
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: April 13, 2004
    Assignee: Showa Denko K.K.
    Inventors: Kohei Morikawa, Shunichi Fukuzumi, Kei Ohkubo, Yutaka Ohnishi
  • Publication number: 20030098229
    Abstract: The present invention relates to a catalyst useful for a photooxidation reaction and also relates to a novel process for producing aldehydes, particularly aromatic aldehydes, which are useful as an intermediate for the production of agrochemical and medical preparations. The catalyst is particularly suitable for the oxidation of a methyl group difficult to oxidize.
    Type: Application
    Filed: September 6, 2002
    Publication date: May 29, 2003
    Applicant: SHOWA DENKO K.K.
    Inventors: Kohei Morikawa, Shunichi Fukuzumi, Kei Ohkubo, Yutaka Ohnishi